How long can I keep it like that or what are the steps for that training method
From there you just let the plant lead you. Watch what it does and train to the shape you want.Try to keep all the tops at the same height.
Check this out:
https://ilgmforum.com/t/am-i-doing-the-lst-correct/67249/5?u=hmgrwn
This is thanks to @Budz